Digital Commons Network^™

Comparison Of Vendor-Pretrained And Custom-Trained Deep Learning Segmentation Models For Head-And-Neck, Breast, And Prostate Cancers, Xinru Chen, Yao Zhao, Hana Baroudi, Mohammad D El Basha, Aji Daniel, Cenji Yu, Jack Phan, Seungtaek L Choi, Chelain R Goodman, Xiaodong Zhang, Joshua S Niedzielski, Sanjay S Shete, Laurence E Court, Zhongxing Liao, Fredrik Löfman, Peter A Balter, Jinzhong Yang

Faculty, Staff and Student Publications

Background/objectives: We assessed the influence of local patients and clinical characteristics on the performance of commercial deep learning (DL) segmentation models for head-and-neck (HN), breast, and prostate cancers.

Methods: Clinical computed tomography (CT) scans and clinically approved contours of 210 patients (53 HN, 49 left breast, 55 right breast, and 53 prostate cancer) were used to train and validate segmentation models integrated within a vendor-supplied DL training toolkit and to assess the performance of both vendor-pretrained and custom-trained models. Four custom models (HN, left breast, right breast, and prostate) were trained and validated with 30 (training)/5 (validation) HN, 34/5 left …

Characterization Of An Inorganic Powder-Based Scintillation Detector Under A Uhdr Electron Beam, Daline Tho, Sam Beddar

Faculty, Staff and Student Publications

Background: Ultra-high dose rate (UHDR) radiation therapy needs a reliable dosimetry solution and scintillation detectors are promising candidates. In this study, we characterized an inorganic powder-based scintillation detector under a 9 MeV UHDR electron beam.

Methods: A mixture of ZnS:Ag powder and optic glue was coupled to an 8 m Eska GH-4001-P polymethyl methacrylate (PMMA) optical fiber. We evaluated the dependence of the detector on dose per pulse (DPP), pulse repetition frequency (PRF), and pulse width (PW). Additionally, we determined the stability and the reproducibility of the detector.

Results: The signal ratio between the PMMA clear optical fiber and the …

Characterization Of An Inorganic Powder-Based Scintillation Detector Under A Uhdr Electron Beam, Daline Tho, Sam Beddar

Faculty, Staff and Student Publications

(1) Background: Ultra-high dose rate (UHDR) radiation therapy needs a reliable dosimetry solution and scintillation detectors are promising candidates. In this study, we characterized an inorganic powder-based scintillation detector under a 9 MeV UHDR electron beam. (2) Methods: A mixture of ZnS:Ag powder and optic glue was coupled to an 8 m Eska GH-4001-P polymethyl methacrylate (PMMA) optical fiber. We evaluated the dependence of the detector on dose per pulse (DPP), pulse repetition frequency (PRF), and pulse width (PW). Additionally, we determined the stability and the reproducibility of the detector. (3) Results: The signal ratio between the PMMA clear optical …

On The Power Series Method For Solitons And Peakons Of Nonlinear Pde, Erika Olivares, Vesselin Vatchev

School of Mathematical & Statistical Sciences Faculty Publications

In this paper we discuss the power series method to obtain traveling wave solutions of nonlinear PDE in one space variable. The method, including a recursive procedure for the coefficients and error estimate for the partial sums, is presented for the Camassa-Holm equation. Numerical examples of approximate single soliton and single peakon solutions are included.

Staff Education Project Staff Education To A Medical Surgical Unit, Kay-Ann Wilson-Phipps

Walden Dissertations and Doctoral Studies

This Doctor of Nursing (DN) project aimed to educate staff on set protocols for preventing catheter-associated urinary tract infection (CAUTI) in a medical-surgical unit. The CAUTI rates in the unit were rising beyond the national standards. The purpose of this project was to effectively reduce the CAUTI rates by at least 25% by providing knowledge in the form of best practices to the nursing staff about catheter insertion, care, and removal. The practice-focused question attempted to answer whether staff education on CAUTI protocols would increase knowledge. Thirty-seven staff members voluntarily participated in the education project, including nursing staff, infection control …

Examining The Internet Hunting Styles Of Violent Sexual Predators Who Rape And Murder Their Victims, Rebecca Meyers

Walden Dissertations and Doctoral Studies

The proposed study sought to explore the impact of the internet on the hunting styles of sexual predators who sexually assault and kill their victims. A sample of 32 cases, divided equally among offenders who used the internet to target adult females and those who did not use the internet, was used for the study. The findings showed that various internet-based platforms were used for targeting, including dating apps such as Grindr, Match.com, Meetme.com, Tinder, Craigslist, Sex chat rooms, Kik Messenger, and BDSM sites. Three themes emerged about the impact of the internet on the hunting styles of sexual predators …

Exploring Kindergarten Teachers' Perspectives On The Interpretation Of Standards In A Developmentally Appropriate Way In Kindergarten Classrooms, Shawanza Demetrist Lockett

Walden Dissertations and Doctoral Studies

Many kindergarten teachers are feeling the effects of standard-based education. The problem is that it is unknown whether teachers implement mandated state standards in a developmentally appropriate way. The purpose of this basic qualitative study was to investigate kindergarten teachers’ perspectives on implementing standards in a developmentally appropriate manner. Shulman’s theory of teacher knowledge was the conceptual framework for the study. The research question focused on kindergarten teachers’ perspectives of implementing standards in a developmentally appropriate way. Twelve kindergarten teachers were recruited from three Title 1 elementary schools in a rural southeastern state in the United States. Thematic data analysis …

Autoethnographic Examination Of Moral Distress While Working For The For-Profit Substance Use Disorder Treatment Sector, Kapil Nayar

Walden Dissertations and Doctoral Studies

Interpersonal conflicts and moral distress due to authority figures' unethical and illegal practices are widely discussed topics in the literature. Coping with these experiences and becoming a whistleblower, however are understudied in the counseling field, and are often stigmatized yet advocated for in our codes of ethics. The purpose of this qualitative autoethnographic study is to (1) show moral distress exists in the for-profit sector of substance use disorder treatment; (2) moral distress results from counselors discovering evidence of unethical and illegal activities; (3) moral distress results from the act of blowing the whistle and (4) offers a roadmap for …

Suicide Risk Assessment And Student Competency In Cacrep-Accredited Master's Counseling Programs, Meghan Kyle O'Meara

Walden Dissertations and Doctoral Studies

Suicide remains a public health issue, demanding proficient training of future counselors in suicide risk assessment (SRA). However, concerns persist regarding the competency of counselors-in-training (CITs) in this crucial area. This study explored the predictive relationship between theory of planned behavior (TPB) constructs and students’ perceived competency in SRA. Grounded in the TPB, the research addressed how attitudes (ATT), subjective norms (SN), and perceived behavioral control (PBC) influence intentions and subsequent behavior, using a nonexperimental survey design to collect data from students in Council for Accreditation of Counseling & Related Educational Programs (CACREP)–accredited master's counseling programs via a comprehensive questionnaire. …

Strategies Small Business Leaders Use To Retain Employees To Reduce Turnover Costs, Karla Gilchrist-Saunders

Walden Dissertations and Doctoral Studies

Failure to retain employees negatively affects organizational financial sustainability. Small business leaders become concerned when their organizations fail to retain employees, resulting in increased costs and decreased competitiveness, organizational knowledge, team dynamics, and valuable human resources. Grounded in transformational leadership theory, the purpose of this qualitative pragmatic inquiry study was to identify and explore leadership strategies some small business leaders use to retain employees to reduce turnover costs. The participants were six small business leaders in the Washington, DC, metropolitan area with successful strategies used to retain employees to reduce turnover costs. Data were collected from semistructured interviews and publicly …

The Psychological And Physical Impact Of The Opioid Crisis On Families, Adrienne Antoinette Hunter Wells Green

Walden Dissertations and Doctoral Studies

Many rural areas in the United States have experienced an opioid crisis. Social support programs could be created to address social support for the families affected by opioid addiction. The purpose of this non-experimental, cross-sectional research study was to examine the possible relationship between (a) prescription or non-prescription addiction; (b) opioid addiction or another addiction; (c) the amount of family social support of a family member who has ongoing interactions with the individual struggling with addiction; and (d) stress of the family member in a rural area. Bowen’s family systems theory provided the theoretical framework for the study. A non-probability …

Leadership Strategies Indigenous Canadian Entrepreneurs Use To Sustain Their Business, Sherry Tyeesum Mattice

Walden Dissertations and Doctoral Studies

Indigenous Canadian small business entrepreneurs face a high risk of failure within five years of operation. These entrepreneurs encounter challenges such as limited access to capital and skilled employees and must develop strategies to sustain and grow their businesses. Grounded in the theory of constraints, the purpose of this qualitative multiple-case study was to explore strategies employed by Indigenous small business entrepreneurs to effectively sustain their businesses beyond 5 years. The participants were six Indigenous small business entrepreneurs in British Columbia who implemented strategies to sustain their businesses beyond 5 years. Data were collected through semistructured interviews and by reviewing …

A Topological Route To Engineering Robust And Bright Supersymmetric Laser Arrays, Soujanya Datta, Mohammad Alizadeh Fard, Ramy El-Ganainy, Krishanu Roychowdhury

Michigan Tech Publications

In recent years, several proposals that leverage principles from condensed matter and high-energy physics for engineering laser arrays have been put forward. The most important among these concepts are topology, which enables the construction of robust zero-mode laser devices, and supersymmetry (SUSY), which holds the potential for achieving phase locking in laser arrays. In this work, we show that the relation between supersymmetric coupled bosonic and fermionic oscillators on one side, and bipartite networks (and hence chiral symmetry) on another side can be exploited together with non-Hermitian engineering for building one- and two-dimensional laser arrays with in-phase synchronization. To demonstrate …

Engagement And Access To Support For Oral Health, Substance Use, Smoking And Diet By People With Severe And Multiple Disadvantage: A Qualitative Study, Neha Jain, Emma A. Adams, Emma C. Joyes, Gillian Mclellan, Martin Burrows, Martha Paisi, Laura J. Mcgowan, Lorenzo Iafrate, David Landes, Richard Watt, Falko F. Sniehotta, Eileen Kaner, Sheena E. Ramsay

Peninsula Dental School

Background Severe and multiple disadvantage (SMD) is the combined effect of experiencing homelessness, substance use and repeat offending. People experiencing SMD have high burden of physical and mental health issues. Oral health is one of the most common health problems in people experiencing SMD which interacts with substance use, smoking, and unhealthy diet to create a cycle of harm and disadvantage. However, burden of these conditions is worsened by poor access to health services. This study aimed to identify pathways to improve engagement and access to health interventions, for oral health, substance and alcohol use, smoking and diet. Methods Using …

Terrestrial Evidence For Volcanogenic Sulfate-Driven Cooling Event ~30 Ka Before The Cretaceous–Paleogene Mass Extinction: Volcanism-Induced Cooling ~30 Ka Pre-K–Pg Boundary, Lauren O'Connor, Rhodri Jerrett, Gregory Price, Tyler Lyson, Sabine Lengger, Francien Peterse, Bart Van Dongen

School of Geography, Earth and Environmental Sciences

Alongside the Chicxulub meteorite impact, Deccan volcanism is considered a primary trigger for the Cretaceous–Paleogene (K–Pg) mass extinction. Models suggest that volcanic outgassing of carbon and sulfur—potent environmental stressors—drove global temperature change, but the relative timing, duration, and magnitude of such change remains uncertain. Here, we use the organic paleothermometer MBT′5me and the carbon-isotope composition of two K–Pg-spanning lignites from the western Unites States, to test models of volcanogenic air temperature change in the ~100 kyr before the mass extinction. Our records show long-term warming of ~3°C, probably driven by Deccan CO2 emissions, and reveal a transient (<10 kyr) ~5°C cooling event, coinciding with the peak of the Poladpur “pulse” of Deccan eruption ~30 kyr before the K–Pg boundary. This cooling was likely caused by the aerosolization of volcanogenic sulfur. Temperatures returned to pre-event values before the mass extinction, suggesting that, from the terrestrial perspective, volcanogenic climate change was not the primary cause of K–Pg extinction.

Addressing Lung Truncation In 99mtc-Maa Spect/Ct For 90y Microsphere Radioembolization Treatment Planning, M Allan Thomas, Richard Laforest, John Karageorgiou, Dan Giardina, Tyler J Fraum, Chris D Malone, Justin K Mikell

2020-Current year OA Pubs

BACKGROUND: Prior studies have established that macroaggregated albumin (MAA)-SPECT/CT offers more robust lung shunt fraction (LSF) and lung mean absorbed dose (LMD) estimates in

METHODS: Lung truncation was simulated in 56 cases with adequate (> 90%, mean: 98%) lung coverage in MAA-SPECT/CT by removing slices in ~ 5 mm increments from the lung apices to the diaphragm. A wide range of lung coverages from 100% to <  1% in ~ 2% increments were created. LSF and LMD were calculated with four methods. (1) 2D planar imaging standard (not truncated), truncated lung SPECT/CT data was: (2) used with no corrections (SPECT

RESULTS: Averaged across simulated lung coverages from 40 to 80%, percent errors relative to non-truncated data for SPECT

CONCLUSION: LSF and LMD can be estimated for

Recent Trends And Biases In Mesophotic Ecosystem Research, Veronica Z. Radice, Alejandra Hernández-Agreda, Gonzalo Pérez-Rosales, Ryan Booker, Jessica Bellworthy, Manon Broadribb, Gaby E. Carpenter, Clara Diaz, Ryan J. Eckert, Nicola L. Foster, Johanna C. Gijsbers, Erika Gress, Jack H. Laverick, Valerio Micaroni, Miriam Pierotti, Héloïse Rouzé, Angela Stevenson, Alexis B. Sturm, Pim Bongaerts

School of Biological and Marine Sciences

Mesophotic ecosystems (approx. 30-150 m) represent a significant proportion of the world's oceans yet have long remained understudied due to challenges in accessing these deeper depths. Owing to advances in underwater technologies and a growing scientific and management interest, there has been a major expansion in research of both (sub)tropical mesophotic coral ecosystems and temperate mesophotic ecosystems. Here, we characterize the recent global trends in mesophotic research through an updated release of the 'mesophotic.org' database (www.mesophotic.org) where we reviewed and catalogued 1500 scientific publications. In doing so, we shed light on four major research biases: a gross imbalance in (a) …

The Biomechanics Of Fibrillin Microfibrils: Lessons From The Ciliary Zonule, Pooja Rathaur, Juan Rodriguez, John Kuchtey, Samuel Insignares, Wendell B Jones, Rachel W Kuchtey, Steven Bassnett

2020-Current year OA Pubs

Marfan syndrome is an inherited connective tissue disorder that affects the cardiovascular, musculoskeletal, and ocular systems. It is caused by pathogenic variants in the fibrillin-1 gene (

An Adaptive Algorithm To Provide Fan Speed Control, Chejung Liu, Vic Chia

Defensive Publications Series

Proposed herein is a new algorithm to facilitate fan speed control (FSC) for cooling fans of electronic devices that utilizes existing sensor readings for a device to determine the altitude at which the device is operating. With this estimated altitude value, fan speed control mechanisms can be enhanced from conventional two-dimensional (2D) control techniques that only consider temperature versus (vs) duty cycle to three-dimensional (3D) control techniques that consider temperature vs altitude vs duty cycle to manage fan speed. Utilizing techniques as proposed herein, an optimized fan speed control mechanism can be provided for electronic devices that reduces power consumption …

Medication-Induced Esophageal Injury In Cats And Dogs: A Comprehensive Review, Naowarat Suthamnatpong, Aranya Ponpornpisit

The Thai Journal of Veterinary Medicine

Medication-induced esophageal injury (MIEI) is a significant concern in veterinary medicine, affecting the health and well-being of animals undergoing various pharmaceutical treatments. If not addressed promptly, MIEI can lead to severe complications such as esophagitis, esophageal stricture, perforation, and even mortality. This review aims to provide a comprehensive examination of MIEI in veterinary medicine, covering essential aspects such as the basic structure of the esophagus, the epidemiology and etiology of MIEI, and the factors influencing susceptibility. The mechanisms of injury are discussed in detail, focusing on direct mechanical injuries, chemical injuries from medication components, and systemic effects. The review also …

Interaction Of Cumulus-Oocyte Complex (Coc) Number, Oocyte Quality, And Blastocyst Numbers By Repeated Ovum Pick-Up (Opu) In In Vitro Embryo Production, Sakine Ülküm Çizmeci, Dursun Ali Dinc, Mustafa Numan Bucak, Ömer Faruk Yesilkaya, Muhammed Furkan Ciftci, Mehmet Buğra Kivrak, Ayşe Sari, Hasan Ali Cay, Maide Golbasi, Mustafa Bodu

The Thai Journal of Veterinary Medicine

Ovum pick-up (OPU) is a repeatable technique that is used for the retrieval of large numbers of immature oocytes from the antral follicles of live animals. The aim of the present study was to determine the effect of repeated OPU application on cumulus-oocyte complex (COC) number, oocyte quality, and blastocyst rates. The animal material for the study consisted of 10 Holstein heifers. Heifers selected as donors were administered OPU a total of 9 times on random days of the cycle at 1-week intervals. All antral follicles with a diameter of 2-8 mm were aspirated during the OPU procedure. In vitro …

Clinical Features And Imaging Characteristics Of Penile Hematoma Mimicking Priapism In A Dog, Yujeong Shin, Dongseok Kim, Daji Noh, Min Jang, Young-Sam Kwon, Sang-Kwon Lee, Kija Lee

The Thai Journal of Veterinary Medicine

A 2-year-old, castrated male Jindo dog presented with 6 days of penile swelling and protrusion, suggesting priapism. Blood gas was analyzed by aspirating the corpus cavernosum to differentiate the type. However, the results were ambiguous. Ultrasound and computed tomography revealed a well-encapsulated mass ventral to the urethra. Magnetic resonance imaging showed a mass (T2-hyperintense, T1-hypointense, with no contrast enhancement) located ventral to the urethra. Cytology revealed only red blood cells, confirming a hematoma. Penile hematoma mimicking priapism was diagnosed. After 11 weeks of glucocorticoid administration, the hematoma and the protruded penis resolved. This case suggests that penile hematoma can be …

Teaching Sociology Through Reality Tv: Understanding Society Through The Small Screen, Monica Bixby Radu

Journal on Empowering Teaching Excellence

Access the online Pressbooks version of this introduction here.

This article explores reality TV’s value in teaching sociological concepts and theories for a better understanding contemporary society. Reality TV serves as a rich canvas for illustrating key tenets of major sociological theories such as structural functionalism, conflict theory, and symbolic interactionism. By analyzing reality TV through a sociological lens, insights into societal dynamics emerge, revealing how individuals navigate social norms. Additionally, reality TV serves as a cultural mirror, reflecting and shaping societal values. Globally, it influences cultural attitudes and social dynamics, transcending geographical boundaries through adaptations and social media engagement. …

Enhanced Instructional And Professional Growth Through A Pragmatic Instructional Approach, Joanna C. Weaver, Gabriel T. Matney, Chloe Beeker, Alex Zalar

Journal on Empowering Teaching Excellence

Access the online Pressbooks version of this introduction here.

Finding a pragmatic process across university programs and disciplines that has the potential to strengthen programs and instruction has promise for adoption because of the possible impact and benefits. Jigsaw Lesson Study (JLS) has that potential and could be expanded into not only a teacher-education classroom but also into any discipline across a university campus. JLS offers opportunities for student engagement and professional development. Here, we used the JLS process, modified from Lesson Study (LS), to strengthen instructional decision-making, lesson planning, and student learning in a teacher-education course. We sought to …

Full Issue: Journal On Empowering Teaching Excellence, Volume 8, Issue 2, Fall 2024

Journal on Empowering Teaching Excellence

The full-length Spring 2024 issue (Volume 8, Issue 1) of the Journal on Empowering Teaching Excellence

Access the online Pressbooks version (with downloadable EPUB format) here.

The Fall 2024 issue presents practical ideas and prompts for those who teach at colleges and universities in a variety of disciplines. Articles ways to use popular culture (in this case, reality TV) to teach higher-level concepts; strategies for adapting Lesson Study techniques for preservice teachers; and a review of McNair et al.'s 2022 book on creating student ready colleges.

Leveraging Gamification And Social Media To Teach Heart Failure Clinical Practice Guidelines In Entry-Level Physical Therapist Education, Kaelee Brockway

Journal of Innovation in Health Sciences Education

Introduction: Clinical practice guideline adherence remains a challenge in health care, with reported rates as low as 26%. Research shows multiple barriers to adherence, including limited access and guideline complexity. Integrating guidelines into education is crucial, demanding innovative methods to enhance translation into practice.

Methods: This multiple methods study explored application of the substitution, augmentation, modification, and redefinition model to integrate social media and gamification activities to engage students in learning action statements of a clinical practice guideline for the management of heart failure. Performance on exam items relevant to the guideline content were used to determine if this …

Programmatic Accreditation: Implementation Strategies For College Kinesiology Program Directors, Kworweinski Lafontant

Topics in Exercise Science and Kinesiology

Programmatic accreditation within Kinesiology sub-disciplines, such as physical therapy and sports medicine, have typically been required at the graduate level. Within the coming decade, major certifications for exercise physiology (ACSM-EP) and strength & conditioning (CSCS) will institute programmatic accreditation requirements at the undergraduate level. This article takes a narrative review approach at examining ways that programmatic accreditation at the undergraduate level may impact incoming undergraduate students, such as necessitating earlier specialization and limiting the ability for late-stage career changes. To mitigate these impacts, college kinesiology program directors may benefit from considering the perspectives of students as they work to meet …

Game On! A Comparative Analysis Of External Load In Division Iii Soccer Players Across Gender And Position, Bianca J. De Lucia, Daniel M. Smith, Ashima Fillbach, Mary K. Feit

Topics in Exercise Science and Kinesiology

Global positioning systems have been used increasingly in sports science due to their ability to quantify external loads of athletes during competitions and practices. Limited research has examined gender differences in external load throughout a collegiate soccer season. PURPOSE: The aim of this study was to compare game workloads across collegiate men (MSOC) and women (WSOC) soccer players. Division III MSOC and WSOC players wore GPS devices during games throughout a 15-week season. METHODS: Metrics analyzed from GPS data were: total distance (TD), sprint distance (SD), number of deceleration efforts (decel) (>-3 m/s²), number of acceleration efforts (accel) ( …

Co-Regulation: Easy Neuroscience And Connection Strategies For The Classroom And Beyond, Ginger Healy

Georgia Association for Positive Behavior Support Conference

This presentation will discuss the "why?"' behind the need for educational environments that are nervous system-focused and brain-based. This session is rooted in the principles that behavior is communication and safe, positive, attuned relationships are the antidote! We will dive into the keys to bringing emotional stability in the classroom through regulation and co-regulation. Early adversity and stress can re-wire a child's brain and nervous system leading to BIG BEHAVIORS and lagging skills, but we can re-wire those patterns and reactions so that students can thrive and educators can avoid burnout. This session will build resilience in both educators and …

Integrating Supports To Meet The Needs Of The Whole Child, Rebecca Wright, Deshonda Stringer

Georgia Association for Positive Behavior Support Conference

Georgia Multi-Tiered System of Supports (GaMTSS) is a data-driven, multi-level prevention system designed to meet the needs of the whole child by implementing a continuum of tiered supports. This session will discuss the integration of academics, behavior, and well-being which is essential for student and educator success. These supports play a critical role in impacting positive school climate. An overview of the five essential components of GaMTSS, with an emphasis on building a strong infrastructure, will also be discussed.